How is visual field testing done?
Visual fields are measured by a computerized assessment in the office. For this procedure, one eye is covered and the patient places his or her chin in a projection device. Then, when the patient sees lights of various intensities and at different locations, he or she pushes a button. This process produces a computerized map of the visual field.
Visual Field Instruments
We use two different visual field instruments:
- Zeiss Matrix using Frequency Doubling Technology (FDT) link
- Zeiss Humphreys HFA 11-i (link) Field analyzer
These instruments help us to examine for optic nerve diseases and treat glaucoma. We can also perform an Estermann test necessary for some driver’s licensure.